<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script>
  //对象级别的继承
  // obj.__proto__ --> {x:"x"}
  var obj = Object.create({x:"x"})
  console.log(obj);

  //如何创建一个干净的对象
  var obj2 = Object.create(null)
  console.log(obj2);
</script>
</html>